Welcome to our site

Usus is the Latin for usage and this is an independent community-run website for those interested in the usage of online content. As such it provides a medium to discuss all aspects of usage in general and ways of measuring usage in particular. Usus is designed to serve librarians, library consortium administrators, publishers, aggregators, repository managers, as well as individual scholars.

Usus provides:

  • A forum for community discussion on issues relating to the COUNTER usage reports, as well as wider usage issues
  • A place for COUNTER ( and SUSHI) to solicit feedback on future plans and ideas
  • A collection point for suggestions for new COUNTER usage reports and metrics
  • A source of hints and tips on solving known problems
  • A list of vendors/reports with problems that are affecting the credibility and or usefulness of the COUNTER reports.
  • Links to other usage resources


  • COUNTER (Counting Online Usage of Networked Electronic Resources), launched in 2002, is an international initiative to improve the reliability of online usage statistics. It is supported by the vendor, intermediary and librarian communities. COUNTER’s objective is to ensure that vendor online usage reports are credible, compatible and consistent. This is achieved by the publication of Codes of Practice that specify the content, format, delivery mechanisms and data processing rules for a set of core usage reports that are easily implemented by vendors and easily understood by librarians and others who use them.


  • NISO is where content publishers, libraries, and software developers turn for information industry standards that allow them to work together. Through NISO, all of these communities are able to collaborate on mutually accepted standards — solutions that enhance their operations today and form a foundation for the future.


  • SUSHI is an ANSI/NISO Standard that defines an automated request and response model for harvesting e-resource usage data. It is designed to work with COUNTER, the most frequently retrieved usage reports.

News & opinions

  • COUNTER Code of Practice Release 5 is now available at https://www.projectcounter.org/code-of-practice-five-sections/abstract/. You can find a Friendly Guide...
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    July 17, 2017

  • SUSHIStarters Client Version 2 Alpha (Compatible with COUNTER Release 4) This an enhanced and updated version of...
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    July 06, 2017

Hints & tips

  1. COUNTER, via Mitchell Dunkley, a Principal Information Assistant for De Montfort University (DMU) Library & Learning Services,...
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  2. In order to help librarians understand Result Clicks and Record Views in the COUNTER Database Reports, Eric...
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